VW Earth Pressure Cell

Overview

The Model 4800 Earth Pressure Cells are designed to measure total pressure in earth fills and embankments. All cells consist of two circular stainless steel plates welded together around their periphery and spaced apart by a narrow cavity filled with de-aired oil. Changing earth pressure squeezes the two plates together causing a corresponding increase of fluid pressure inside the cell. A vibrating wire pressure transducer converts this pressure into an electrical signal which is transmitted to the readout location.

Specifications

Standard Ranges 70, 170, 350, 700 kPa; 1, 2, 3, 5, 7.5, 20 MPa
Over Range 150% F.S. (maximum)
Resolution 0.025% F.S.
Accuracy¹ ±0.1% F.S.
Temperature Range −20°C to +80°C
Height × Diameter² 6 × 230 mm

¹Stated accuracy is for the pressure transducer alone.
The total system accuracy (pressure transducer + pressure cell) is subject to site-specific variables.
²Other sizes available on request.
*Please Note: Models are also available (3500 Series) with semiconductor pressure transducers to enable measurement of dynamic pressures (please contact us for details).